Nice write up mate. As far as I am aware Holley also uses sensors that are easily available around the place. I have been looking at both Holley Sniper (good points about it) and the 600hp PA version FiTech. My only real concern about the FiTech is the aftermarket availablity of their sensors/spares.

I guess a couple of small mods with the snips and pliers you could mod the standard aircleaner base to fit too.